Armature-coil.



No. 696,398. Patented Apr. I, |902.

A. F. BATCHELDER.

ARMATURE COIL.

(Appliution led Nov.- 3, 1900,)

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Asarawhelden ISi UNITED STATES PATENT OEEICE.

ASA F. BATOHELDER, OF SCHENEOTADY, NEW YORK, ASSIGNOR TO THE GENERALELECTRIC COMPANY, A CORPORATION OF NEW' YORK.

ARMATURE-C'OIL.

SPECIFICATION forming part of Letters Patent No. 696,398, dated April1,. 1902. Application nea Noventa 3.1900.' Seriana. 35.333. (Numan.)

To aZZ whom it may concern:

-Be it known that I, AsA F. BATCHELDER, a citizen of the United States,residing at Schenectady, county of Schenectady, State of New York, haveinvented certain new and useful Improvements in Armature-Coils, (Case No.

tion.

Myinvention relates to coils for armatures fordynamo-electric generatorsand motors; and its Objectis to enable a compact and rm coil of thewell-known Eickemeyer type to be wound of small wire. Heretofore it hasbeen a diflicult and troublesome job to wind a rectangular coilfroniwire as small as .025.inches in diameter owing to the fact thateach turn .iciency of the machine.

of wire tends to slip out of place and overlap adjoining turns. Thisprevents the spaces between the armature-teeth from being iilled solidlyand evenly, and hence reduces the ef- In those small motors andgenerators which are designed to o'ccupy as"-1ittle space as possiblethis is a serious drawback. For the sake of'securing a more compact andeconomical construction I have devised the improvement set forth, landparticularly pointed ont in the claims.

In brief, it consists in two or more wires laid side by side and securedtogether, so that when wound into a coil each turn of the coil isrectangular, and hence the turns lie iiat on each other and have notendency to slip od sidewise.

In the drawings, Figure l represents an Eickemeyer coilwonnd inaccordance with my invention. Fig. 2 is a View, on an exaggerated scale,showing a piece of the multiple wire which I have devised. Fig. 3 is across-section showing how the coils till the slot be tween the teeth onthe core.

The insulated wires a b are so small in practice that they will notreadily remain superposed when laid up in a coil, but constantly tend toslip out sidewse and destroy the smooth and even shape of the coil. Itherefore provide a rectangular conductor containing two or more wiresinsulated from each other and constituting what I term a multiple wire.This may be constructed in any 1,64%) of which the following is aspecilica-- convenient manner. I prefer to lay the insulated wires a l)side by side and wrap around them a thin and preferably fiat lashing c,of

' lar and lying flat upon the one below, as shown in Fig. 3. It will-beseen that two turns of a conductor containing two wires make a four-turncoil, which solidly ills the slot between the teeth d of the armature.

While I have shown my invention as applied to tw'o wires a b, yet I wishit understood that I may similarly construct a multiple conductor havingany number of wires, preferably such a number as will constitute arectangular structure each turn of which when it is Wound into a coilwill lie hat on the adjacent turn, and thus have no tendency to slipolf.

' Havingfthus described my invention, what 'Iclaim as new, and desire tosecure byLetters Patent'of the United States, is

' l. A coil for the armature of a dynamo-elec tric machine, composed ofturns each contain inga plurality of wires side by side.

2. Acoil for the armature of a dynamo-electric machine, composed ofmultiple wires lying straight and parallel.

l 3. A coil for an armature, composed of superpoed turns each composedof avplurality of insulated wires lashed together in rectangular form.

4. An electric-machine coil having a plurality of turns, each of whichis composed of a plurality of insulated wires laid side by side and alashing of insulating material binding them together.

5. A coil for an electric machine, which is composed of turns consistingof a plurality 'of wires held rigidly together side by side to form aflat turn, said turns being laid atwise one upon another to ill thewinding-space.

In witness whereof I have hereunto set my handlthis 1st day of October,1900.

ASA F. BATGHELDER. Witnesses:

BENJAMIN B. HULL, MARGARET E. WooLLnY.

